export default{
  namespaced: true,
  
  state:() =>({
    // cart:uni.getStorageSync('cart') || '[]'
    cart:JSON.parse(uni.getStorageSync('cart') || '[]')
  }),
  mutations:{
    addToCart(state,goods){
    const findResult = state.cart.find(x => x.goods_id===goods.goods_id)
    if(!findResult){
      state.cart.push(goods)
    }
    else{
       findResult.goods_count ++
    }
    this.commit('m_cart/saveToStorage')
    },
    saveToStorage(state){
       uni.setStorageSync('cart',JSON.stringify(state.cart))
    },
    updateGoods(state,goods){
      const findResult = state.cart.find(x=> x.goods_id === goods.goods_id)
      if(findResult){
        findResult.goods_state = goods.goods_state
        
         this.commit('m_cart/saveToStorage')
      }
    },
    deleteGoods(state,goods_id){
      state.cart = state.cart.filter(x=> x.goods_id !==goods_id)
      
       this.commit('m_cart/saveToStorage')
      },
    updataGoodsCount(state,goods){
      const findResult = state.cart.find(x => x.goods_id ===goods.goods_id)
      if(findResult){
        findResult.goods_count = goods.goods_count
        
         this.commit('m_cart/saveToStorage')
      }
    },
    // 全选/反选
    updateAllState(state,newState){
       state.cart.forEach(x => x.goods_state = newState)
       
       this.commit('m_cart/saveToStorage')
    }
  },
  getters:{
    total(state){
      // let c =0
      // state.cart.forEach( x => c +=x.goods_count)
      // return c
     return state.cart.reduce((total,item) => total+=item.goods_count,0)
    },
    checkedCount(state){
     return  state.cart.filter(x => x.goods_state).reduce((total,item) => {return total += item.goods_count},0)
    },
    checkedsCount(state){
       return state.cart.filter(x => x.goods_state).reduce((total,item) => { return total += item.goods_count*item.goods_price},0).toFixed(2)
    }
  }
}